Steel - Black The Aviator 8 B35 Automatic Unitime 43 was designed with international travelers in mind. The automatic wristwatch offers world-time indication through an ingenious independent hour hand that can be adjusted with the crown. At the heart of the COSC-certified chronometer is the Breitling Manufacture Caliber B35. The stunning dial is available in black or silver. The Aviator 8 B35 Automatic Unitime 43 has a transparent sapphire caseback. MOVEMENTCaliber Breitling B35 (Manufacture)Movement Selfwinding mechanical, world timePower reserve approx. 70 hrsVibration 28,800 v.p.hJewel 41 jewelsCalendar Dial aperture CASECase SteelCaseback Screwed in (sapphire crystal)Water resistance 100 m (330 ft)Bezel BidirectionalCrown Screw-locked, two gasketsCrystal Cambered sapphire, glareproofed both sides DIMENSIONSDiameter 43.00 mmThickness 14.55 mmWeight (without strap) 194.74 g. STRAPLug 23/20 mm Steel 1.4435 AB3521U41B1A1